ADU / In-Law Unit
ADU & In-Law Unit Contractors in the Bay Area, CA
JML Construction Services specializes in designing and building Accessory Dwelling Units (ADUs) and in-law apartments throughout the Bay Area. Whether you’re looking to create space for extended family or generate rental income, building an ADU on your existing property is a smart and cost-effective solution. With decades of experience and a 5-star reputation on Google and Yelp, our team handles every phase of the project—from design and permits to construction and final inspection. We make it easy to turn your backyard into a valuable living space that fits your needs and adds long-term value to your home.
Why Choose JML Construction for Your ADU Project?
Over 40 Years of Trusted Experience – Trusted by homeowners across the East Bay for quality craftsmanship and reliable service.
5-Star Rated on Google and Yelp – Consistently praised for professionalism, transparency, and exceptional results.
Strong Relationships With Local Planning Departments – Our established relationships with local planning departments and comprehensive understanding of city and county regulations will ensure that your ADUs timeline remains on schedule.
Permitting Process – We manage the permitting process and consult with all relevant agencies that govern the construction and installation of the ADUs.
Experts in Local and State ADU Regulations – Fully knowledgeable in California’s ADU laws and city-specific ordinances to ensure a smooth permitting process.
Full-Service Design and Construction – From initial concept, working with architects, applying for permits, to the final inspection, we handle every step in-house.
Upfront Cost Confirmation – We review and confirm the final project scope and pricing with you upfront. Once approved, we submit the permit application, oversee all inspections, and ensure the project passes final approval.
What Is an Accessory Dwelling Unit (ADU)?
Accessory Dwelling Units (ADUs)—also called in-law units, granny flats, secondary units, or backyard cottages—are self-contained residential spaces located on the same lot as a primary home. These smaller living units offer a practical way to expand housing options for family members, guests, or tenants.
With many cities across California adopting more flexible ADU regulations to address the state’s housing shortage, homeowners now have a valuable opportunity to increase livable space and property value. Whether you’re considering a detached unit or converting an existing structure, it’s important to understand your local guidelines. For detailed information on state laws and local ordinances, visit the California Department of Housing and Community Development’s ADU Handbook.
Your Options for Building an ADU
The versatility of the build process means you have a few options for an ADU on your property, including:
Build your dream ADU from scratch with our team's expert design and construction services, created just for your property.
We renovate existing spaces, such as basements, garages, or hobby rooms, into functional units for aging parents or rental units.
You can also opt for a cost-effective and time-efficient option with modern, prefabricated units.
We can build to local municipalities pre-approved plans, saving you time and money.
Designing ADUs With Accessibility in Mind in the Bay Area
Thoughtfully Designed ADUs With Long-Term Accessibility in Mind
When planning an Accessory Dwelling Unit (ADU) in the East Bay —including cities like Clayton, Walnut Creek, Concord, Danville, Lafayette, Orinda, Brentwood, Oakley, and Pleasant Hill—it’s important to consider both the current and future needs of the people who will live there. At JML Construction Services, we specialize in building ADUs that are not only stylish and functional but also thoughtfully designed with accessibility in mind.
Many ADUs are created for aging parents or family members who may not have mobility challenges today but could benefit from barrier-free design in the future. Our team has extensive experience incorporating aging-in-place features like wide doorways, no-step entries, walk-in showers, and other accessibility upgrades into both new ADU construction and garage conversions.
If your project includes kitchens, bathrooms, or new flooring, we can integrate thoughtful accessibility improvements such as grab bars, low- or no-threshold showers, paddle levers for faucets and doors, lower vanities or countertops, and upgraded door hinges to allow wider openings for walkers or wheelchairs. These practical additions improve safety and ease of use—without compromising style.
By planning ahead and building your Bay Area ADU with long-term accessibility in mind, you can avoid costly renovations down the road while ensuring your space remains safe, comfortable, and fully functional for years to come.
City Pre-Approved ADU Plans
With the rise in popularity of ADUs in the Bay Area, many cities are now offering pre-approved ADU plans and permitting to simplify the process. Currently, these pre-approved plans are available for homeowners in:
Built to Last With the Best Materials & Warranty
All of our construction projects include premium, environmentally conscious materials from trusted manufacturers. Whether it’s the foundation, framing, or finishing touches, you can be confident your ADU is built to stand the test of time. Our labor comes with a robust 12-month warranty from the project’s completion date. Materials are backed by manufacturer warranties, which we can assist with should you ever need them.
Schedule a Consultation for ADU Construction
If you want to create more space for your loved ones or generate some extra income, JML Construction Services can help with our ADU construction services in the Bay Area, CA. Contact us today to schedule a consultation to discuss your project.